Sodium Iodate 343 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [7681-55-2] Ricci, J.E.; Linke, W.F.

(2) Di sodium (I-4)-tetraoxomo1ybdate (2-) J. Am. Chern. SO~. 1947, 69, 1080-3. (disodium molybdate); Na2Mo04; [7631-95-0]

(3) Water; H 0; [7732-18-5] 2 VARIABLES: PREPARED BY: Composition at 298.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions Na2Mo04 NaI03 Density Nature of mass % mol % mass % mol % g cm- 3 the solid (compiler) (compiler) phasea 39.38 5.378 0.00 0.000 1.432 A 39.16 5.375 0.58 0.083 1.437 " 38.63 5.354 1. 79 0.258 1.450 " 38.46 5.349 2.20 0.318 1.453 A+B 38.51 5.358 2.18 0.316 1.452 " 38.43 5.343 2.21 0.320 1.451 " 38.43 5.343 2.21 0.320 1.454 " 38.47 5.350 2.18 0.315 1.455 " 38.46 5.349 2.20 0.318 1.453 " 37.23 5.090 2.24 0.319 1.436 B 31.49 3.995 2.54 0.335 1.368 " 24.24 2.825 3.08 0.373 1.277 " 17.89 1. 943 3.42 0.386 1.204 " 11.41 1.163 4.16 .'1.441 1.143 " 5.57 0.543 5.67 0.575 1.099 " 0.00 0.000 8.49b 0.838 1.074 " a A'" Na2Mo04·2H20; B = NaI03·H20

b For the binary system the compiler computes the following: 1 soly of NaI03 = 0.469 mol kg-

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Solubilities determined isothermally by C.p. grade sodium molybdate dihydrate com- stirring complexes of known compositions in plete1y dehydrated by heating to 180· C, Pyrex tubes, and sampling the equilibrated and stored at 150·C. The purity of solutions by means of calibrated pipets this anhydrous salt was found to be 100.0 %. fitted with filtering tips. Total solids C.p. grade sodium iodate was found to be were determined by evaporation of an pure within 1/1000. aliquot of saturated solution and drying to r-~C70MME~=NT~S~AN~D~/~O~R~A~D~D~I=T=I70N~A~L~D~A~T~A~:------; constant weight at 125·C. H20

~~ Na2Mo04-NaI03-H20 The iodate content in the saturated solu­ tion was determined iodometrically. A \ large excess of acid (HC1) was necessary to obtain the correct end-point within the short titration time in the presence of the molybdate.

ESTIMATED ERROR: Soly: the accuracy of titrations was within 0.1 %. Temp: precision ± 0.04 K. 344 Sodium Iodate COMPONENTS: ORIGINAL MEASUREMENTS: [49l7-l9~81 (1) Sodium carbonate; Na2C03; Foote, H.W.; Vance, J.E.

(2) Sodium iodate; NaI03; [7681-55-2] Am. J. S~{. 1933, 25, 499-502. (3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto T/K os 273 - 323

EXPERIMENTAL VALUES: Composition of saturated solutions Nature of the NaI03 Na2C03 mass % mol % mass % mol % solid phasea (compiler) (compiler) o - - 6.42 1.15 A 0.81 0.078 6.30 1.14 A+C 0.83 0.080 6.27 1.13 " 2.42b 0.225 - - C 25 - - 22.60 4.728 A 0.52 0.059 22.44 4.715 " 2.16 0.247 22.22 4.745 A+D 2.17 0.248 22.22 4.746 " 2.54 0.282 18.82 3.898 D 8.66b 0.856 - - " 40 - - 32.83 7.670 B 0.50 0.063 32.67 7.667 " 1.79 0.227 32.09 7.603 B+D 1. 75 0.222 32.00 7.570 " 2.00 0.248 29.87 6.918 D 11. 71b 1.193 - - " continued•••••

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Sodium iodate, sodium carbonate and water The authors only state that sodium iodate were placed in glass stoppered bottles and and carbonate were purified by customary rotated in a thermostat. Twenty-four hours methods. were allowed for the attainment of equili­ brium at which time samples of the solution were drawn off through glass wool filters for analysis. Sodium iodate content was determined by add­ ing excess KI, acidifying with sulfuric acid, and titrating the liberated iodine with thio­ sulfate solution. Sodium carbonate was detd in a second sample by titration with HCl using methyl orange indicator. In these ESTIMATED ERROR: carbonate titrations, a constant light source was used and the end point was com­ Nothing specified. pared with a standard made by saturating water containing a few drops of methyl orange with carbon dioxide. The composition of the dry solid phase was REFERENCES: determined by the method of Schreinemakers. Sodium Iodate 345

COHPONENTS: ORIGINAL HEASUREMENTS: (1) Sodium carbonate; Na2C03; [4917-19-8] Foote, H.W.; Vance, J.E.

(2) Sodium iodate; NaI03; [7681-55-2] Am. J. Se~. 1933, 25, 499-502. (3) Water; H20; [7732-18-5]

EXPERIMENTAL VALUES: (Continued) Composition of saturated solutions Nature of the NaI03 Na2C03 a t/"C mass % mol % mass % mol % solid phase (compiler) ( comp.!ler) 50 32.16 7.457 B 1. 30 0.163 31.52 7.374 2.42 0.307 31.31 7.411 B+D 2.54 0.322 31.23 7.396 " 3.34 0.401 25.44 5.701 D 14.06 1.468

a A = Na2C03·l0H20; B = Na2C03·H20; C = NaI03·5H20; D = NaI03·H20

b For the binary system the compiler computes the following:

soly of NaI03 = 0.125 mol kg-l at O°C = 0.479 mol kg-l at 25°C = 0.6702 mol kg-l at 40°C = 0.8267 mol kg-l at 50°C

COMMENTS AND/OR ADDITIONAL DATA:

The phase diagram is given below (based on mass % units).

System NaIO...Na,CO...H,O. showing the solubility isotherms at four temperatures, and the stability areas of the nVl: solid phases. No double salt exists. 346 Sodium Iodate

COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4] Foote, H.W.; Vance, J.E.

(2) Sodium iodate; NaI03; [768l-55-2J Am. J. Sci. 1929, 18, 375-82.

(3) Water; H20; [7732-l8-5J

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto T!K .. 273 - 308

EXPERIMENTAL VALUES: Composition of saturated solutions NaI0 .. NaN0 Nature of the 3 3 a t!OC mass % mol % mass % mol % solid phase (compiler) (compiler) o - - 42.13 13.37 A 0.82 0.113 41.76 13.34 A+D 0.82 0.112 41, 71 13.32 " 0.86 0.117 41.15 13.06 D 1.00 0.131 37.53 11.44 " 1.16 0.147 34.61 10.24 " 1. 31 0.163 32.57 9.438 " 1.38 0.171 32.19 9.298 B+D 1.31 0.163 32.45 9.391 " 1.26 0.151 29.18 8.153 B 1.06 0.117 21.42 5.526 " 2.42b 0.225 - - " 8 - - 43.99 14.27 A 1.67 0.236 43.28 14.25 A+D 1.67 0.236 43.21 14.21 " 1.88 0.259 40.80 13.08 D 1.96 0.266 39.54 12.50 C+D 2.02 0.274 39.36 12.42 C 2.27 0.285 32.23 9.418 " continued.....

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Sodium iodate, sodium nitrate and water Sodium iodate and nitrate used were c.p. were placed in glass stoppered bottles and products which were recrystallized once. rotated in a thermostat. Samples of the solution were drawn off through glass wool filters. The iodate content was determined by adding KI to the solution, acidifying with sulfuric acid, and titrating the free iodine with sodium thiosulfate solution. The nitrate content was calculated from the iodate concentration and the total mass of salts in solution. Water was found by difference. The solid phases were analyzed as wet residues after largely freeing them from water by pressing ESTIMATED ERROR: between filter papers. The composition of the dry residue was determined by Nothing specified. Schreinemakers' method.

REFERENCES: Sodium Iodate 347

COHPONENTS: DRIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4] Foote, H.W.; Vance, J.E. (2) Sodium iodate; NaI03; [7681-55-2] Am. J. SQ{. 1929, 78, 375-82. (3) Water; H20; [7732-18-5]

EXPERIMENTAL VALUES: (Continued) Composition of saturated solutions NaI03 NaN03 Nature of the t/oC mass % mol % mass % mol % solid phasea (compiler) ( compiler) 8 2.25 0.279 31. 03 8.948 B+C 2.22 0.274 30.83 8.868 " 3.90b 0.368 - - B 25 -- 48.04 16.39 A 1.09 0.161 47.39 16.29 " 2.30 0.343 46.73 16.21 A+C 2.25 0.335 46.65 16.16 " 2.38 0.340 43.18 14.34 C 2.55 0.350 39.88 12.76 " 3.69 0.400 15.94 4.018 " 8.66b 0.856 - - " 35 - - 50.15 17.58 A 1.58 0.241 49.25 17.47 " 2.55 0.391 48.68 17.39 A+C 2.55 0.391 48.68 17.39 " 2.60 0.399 48.68 17.41 " 2.66 0.400 46.99 16.45 C 3.85 0.456 24.96 6.886 " 10.57b 1.065 - - " a A = NaN03; B = NaI03.5H20; C = NaI03·H20; D = 2NaI03' 3NaN03' 15H20 b For the binary system the compiler computes the following: soly of NaT03 = 0.125 mol kg-1 at OOC; = 0.205 mol kg-1 at 8°C = 0.479 mol kg-1 at 25°C; = 0.5973 mol kg-1 at 35°C COMMENTS AND/OR ADDITIONAL DATA: Isotherms based on mass % units are reproduced below on the following page.

, " 348 SodiulTl,'I'odate , ~ COHPONENTS: O~IGINAL MEASUREMENTS: (1) Sodium nitrate; NaND 3; [7631-99-4] Foote, H.W.; Vance, J.E. (2) Sodium iodate; NaID3; [7681-55-2] Am. J. SQi. 1929, 18, 375-82.

(3) Water; H2D; [7732-18-5]

COMMENTS AND/OR ADDITIONAL DATA: (Continued)

~ u- ~.l...-__~

L-L """'=..:.;;~~NaI03

2S"C Isotherm 3S"C

9 .. .. 1. ~ ,I"~ Sodf~rr\ '~odate 349 .1 COMPONENTS: : ORIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4] Cornec, M.E.; Spack, A.

(2) Sodium iodate; NaI03 [7681-55-2] Bull. Soc. ChLm. F~. 1931, 49, 582-94.

(3) Water; H20; [7732-18-5]

VARIABLES: ·v . ~REPARED BY: 273 to 373 T/K = \Hiroshi Miyamoto Composition L EXPERIMENTAL VALUES: Composition of sat4r~ted solutions Sodium iodate . ~dium nitrate Densit~ Nature of the mass % g2/lOO g3 mol kg-1 mass % Sl/lOO g3 mol kg-l g cm- solid phasea o 0.53 0.92 0.046 42.0 72.9 8.58 1. 357 A 0.82 1.43 0.0723 41.9 73.0 8.59 1.360 A+S 0.85 1.46 0.0738 40.8 69.9 8.22 1.351 S 1.25 1. 92 0.0970 33.5 51. 3 6.04 1.286 " 1. 34 2.02 0.102 32.5 49.1 5.78 1.278 S+B. 1. 25 1.81 0.0915 29.6 42.8 5.04 1.251 B {l 5 1.28 2.28 0.115 42.8 76.4 8.99 1.373 A+S 2.02 3.15 0.159 34.1 53.4 6.28 1.300 B+C+S 10 m 2.04 1.388 A+S 9.7i 1.97 3.57 0.180 43.5 79.6 9.37 1.387 A+C+S 10 1. 98 3.64 0.184 43.6 80.1 9.42 1.388 A+C lSi 2.95 3.63 0.183 15.8 19.5 2.29 1.144 B+C 20 2.14 4.11 0.208 45.7 87.6 10.3 1.405 A+C 30 2.43 4.88 0.247 47.8 95.8 11. 3 1.423 " 35 2.58 1.432 " 40 2.77 5.83 0.295 49.7 104.7 12.32 1.442 " 50 3.24 1.462 "

continued•.•••

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: The details of procedure were not given. Sodium iodate used was purchased as a The iodate content was determined by titra­ "pure chemical". The salt ws recrystal­ tion with thiosulfate solution. lized four times. The product obtained The total solids were determined by evapora­ was the monohydrate. tion of the solution at about 140°C. The compiler assumes that the concentration of the nitrate was determined by difference.

ESTIMATED ERROR: Nothing specified.

REFERENCES: 350 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4) Cornec, H.E.; Spack, A. (2) Sodium iodate; NaI03; [7681-55-2) But£.. Soc.. CIUm. Fit. 1931, 49. 582-94. ( 3) Water; H2O; [7732-18-5)

EXPERIMENTAL VALUES: (Continued) Composition of saturated solutions Sodium iodate Sodium nitrate Density Nature of the t/oC mass % g2/1OO g3 mol kg-1 mass % gl/100 g3 mol kg-1 g cm-3 solid phase 41. 5i 2.85 6.0 0.30 51LO 106.0 12.47 1.445 A+C+D 35 m 2.85 1.435 A+D 50 2.90 6.39 0.323 51. 7 114.1 13.42 1.458 " 60 2.97 6.87 0.347 53.8 124.4 14.64 1.474 " 70 3.16 7.68 0.388 55.7 135.3 15.92 1.491 " 80 3.35 8.60 0.435 57.7 148.2 17.44 1.509 " 90 3.60 9.79 0.495 59.6 162.3 19.10 1.528 " 100 3.94 11.40 0.5761 61. 5 177 .9 20.93 1.549 " 15 3.05 3.49 0.176 9.4 10.8 1. 27 1.096 B 15 2.97 3.50 0.177 12.2 14.4 1. 69 1.116 " 15 2.95 3.60 0.182 15.0 18.3 2.15 1.138 " 15 m 3.04 3.89 0.197 18.8 24.1 2.84 1.170 " 15 2.85 3.62 0.183 18.4 23.3 2.74 1.164 C 15m 3.03 3.66 0.185 14.3 17.2 2.02 1.133 " 15m 3.48 3.97 0.201 8.8 10.1 1.19 1.096 "

a A = NaN03; B = NaI03·5H20; C = NaI03·H20; D = NaI03 S = double salt: 2NaI03' 3NaN03' 15H20.

m Metastable

i Interpolated. Sodium Iodate 351 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4] Hill, A.E.; Donovan, J.E.

(2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1931, 53, 934-41.

(3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto T/K c 278.15 - 313.15

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 NaN03 Density Nature of the t/OC mass % mol % mass % mol % g cm-3 solid phasea (compiler) (compiler) 5 3.3b 0.310 0.00 0.00 1.028 A 1. 58 0.151 4.50 1.00 1.042 " 1. 55 0.175 22.59 5.927 1.182 " 1. 65 0.193 26.38 7.195 1.214 " 1. 75 0.210 28.44 7.932 1.230 " 1. 87 0.230 30.70 8.781 1.255 " 1. 78 0.220 31.38 9.030 1.262 " 2.10 0.261 31.54 9.128 1.263 " 2.07 0.260 32.48 9.493 1.275 " 1. 86 0.233 32.37 9.424 1.269 " 1. 94 0.248 34.34 10.23 1.291 A+E 1. 76 0.231 36.69 11.19 1.308 E 1. 60 0.213 38.38 11.91 1.324 " 1. 52 0.204 39.17 12.25 1.331 " 1.41 0.192 40.40 12.80 1.336 " 1. 28 0.179 42.74 13.90 1.359 E+D 1.01 0.141 42.94 13.95 1.359 D 0.00 0.000 43.42 13.99 1.368 " continued..•.

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: For sodium iodate-sodium nitrate-water "Good grade" sodium iodate and sodium system, weighed quantities of these salts nitrate were purified by recrystallization. were treated with weighed amounts of water in Pyrex test-tubes. The tubes were slow- ly rotated in a water-thermostat at the desired temperature for about two weeks. After the sIns were allowed to settle, samples were withdrawn into a calibrated pipet fitted with a small cotton filter. One sample was weighed and evaporated in a platinum dish to constant weight at 110'C. From this the water content of the saturat- ed solution was determined. ~E-S-T-I-MA--T-E-D--E-R-R-O-R-:------4 To determine the NaI03 content, a second Soly: the error for the analysis of iodate weighed sample was treated with KI and by iodometry was within 0.2 %. H2 S04, and titrated with Na2S203' The Temp: precision ± 0.05 K. sodium nitrate content was obtained by difference. REFERENCES: 352 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium nitrate; NaN03; [7631-99-4] Hill, A.E.; Donovan, J.E. (2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1931, 53, 934-41. (3) Water; H20; [7732-18-5]

EXPERIMENTAL VALUES; (Continued) Composition of saturated solutions NaI03 NaN03 Density Nature of the mass % mol % mass % mol % g cm- 3 solid phasea (compiler) (compiler) 25 8.67b 0.857 0.00 0.00 1.077 B 6.38 0.634 3.26 0.754 1.078 " 5.99 0.596 3.91 0.906 1.078 " 4.80 0.486 7.32 1. 726 1.092 4.30 0.444 10.10 2.429 1.109 3.68 0.399 16.08 4.058 1.149 3.41 0.381 19.47 5.060 1.171 " 3.06 0.367 27.16 7.593 1.232 " 2.84 0.361 32.67 9.661 1. 276 " 2.60 0.350 38.19 11. 98 1.328 2.31 0.337 45.12 15.34 1. 392 2.23 0.332 46.81 16.24 1.408 B+D 1.09 0.161 47.44 16.32 1.396 D 0.00 0.00 47.98 16.35 1. 388 " 50 13.95b 1.454 0.00 0.00 B 9.63 1.011 5.74 1.403 " 6.22 0.700 17.03 4.460 4.82 0.598 28.18 8.136 " 3.92 0.544 39.15 12.65 4.00 0.561 39.94 13.05 " 3.84 0.548 41.53 13.80 B+C 3.77 0.542 42.26 14.16 C 3.64 0.531 43.46 14.75 3.46 0.515 45.23 15.66 3.09 0.481 49.11 17.80 " 2.91 0.469 51.86 19.46 C+D 1. 58 0.252 52.55 19.49 n 0.00 0.000 53.50 19.61

a A = NaI03.5H20; B• NaI03.H20; C• NaI03; D = NaN03; E = 2NaI03.3NaN03.15H20.

b For the binary system the compiler computes the following: -1 soly of NaI03 • 0.172 mol kg at 5°C -1 = 0.480 mol kg at 25°C • 0.8192 mol kg-1 at 50°C

continued•••• Sodium Iodate 353

COHPONENTS: ORIGINAL MEASURE'ffiNTS: (1) Sodium nitrate; NaN03; [7631-99-4] Hill, A.E.; Donovan, J.E.

(2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1931, 53, 934-41.

(3) Water; H20; [7732-18-5]

COMMENTS AND/OR ADDITIONAL DATA:

Isotherms based on mass % units are reproduced below. lip

NaI01 354 Sodium Iodate

COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium sulfate; Na2S04; [7757-82-6] Foote, H.W.; Vance, J.E.

(2) Sodium iodate; NaI03; [7681-55-2] Am. J. Sci. 1930, 19, 203-13.

(3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto TIK .. 298 - 323

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 Na2S04 Nature of the mass % mol % mass % mol % solid phaseb (compiler) (compiler) 25 - - 21. 75 3.405 A 2.20 0.252 21.30 3.402 " 2.80 0.323 21.18 3.402 A+C 2.78 0.320 21.18 3.401 " 2.80 0.323 21.19 3.404 " 3.17 0.353 17.52 2.716 C 3.76 0.400 12.64 1.874 " 8.66c 0.856 - - " 29.5 - - 28.12 4.727 A 1.62 0.198 27.72 4.730 A+E 1.53 0.187 27.72 4.725 " 1.52 0.184 26.85 4.530 E 1.90 0.228 25.68 4.294 " 2.70 0.325 25.17 4.225 C+E 2.73 0.328 24.86 4.159 " 9.47c 0.943 - - C 35 - - 33.10 5.905 B (A) 0.15 0.019 32.86 5.856 B+D 0.15 0.019 32.91 5.868 " continued..•..

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Sodium iodate, sodium sulfate and water were The authors only stated that sodium iodate placed in glass stoppered bottles and the and sodium sulfate were purified by custom­ bottles rotated in a thermostat. Two weeks ary methods. were allowed for the attainment of equili­ brium except in the case of the solubility isotherm at 25°C and 50°C where a minimum of 48 hours were allowed. Samples of the solution were drawn off through glass wool filters for analysis. The composition of the dry solid phases were determined by the method of Schreine­ makers'. Sodium iodate in the liquid and solid phases was determined by adding potas- t":':,,::,~~~~~------~ sium iodide to the samples, acidifying with ESTIMATED ERROR: sulfuric acid, and titrating the liberated Nothing specified. iodine with thiosulfate solution. The sulfate content was calculated from the iodate concentration and the mass of total salts. Water was found by difference. REFERENCES: Sodium Iodate 355

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium sulfate; Na2S04; [7757-82-6] Foote, H.W.; Vance, J.E. Sodium iodate; NaI03; [7681-55-2] (2) Am. J. Sci... 1930, 19, 203-13. (3) Water; H2O; [7732-18-5]

EXPERIMENTAL VALUES; (Continued) Composition of saturated solutions NaI03 Na2S04 Nature of the t/oC mass % mol % mass % mol % solid phaseb (compiler) (compiler) 35 0.11 0.014 32.83 5.845 D (A) 0.16 0.020 32.18 5.688 " 0.29 0.036 30.92 5.392 " 0.57 0.070 29.63 5.105 " 0.62 0.076 28.98 4.95R D+E 0.80 0.098 28.77 4.921 " 1. 30 0.156 26.06 4.345 E 2.34 0.276 23.62 3.878 " 3.33 0.392 22.57 3.705 C+E 3.59 0.415 20.70 3.338 C 3.73 0.426 19.33 3.075 " 4.47 0.493 15.30 2.350 " 10.57c 1.065 - - " 35 - - 33. lOa 5.905 B (B) 0.15a 0.019 32.86 5.856 B+D 0.15a 0.019 32.91 5.868 " 0.10 0.013 32.82 5,842 D 0.28 0.035 31.06 5.424 " 0.30 0.037 30.35 5.257 " 0.83 0.102 28.84 4.939 D+E 0.90 0.110 28.50 4.864 " 1.29 0.154 25.97 4.325 E 2.39 0.282 23.79 3.916 " 3.33a 0.392 22.57 3.705 C+E 3.59a 0.415 20.70 3.338 C 3.73a 0.426 19.33 3.075 " 4.47a 0.493 15.30 2.350 " 10.57a ,c 1.065 - - "

a Data taken from 35(A) isotherm 50 - - 31. 76 5.574 B 0.17 0.21 31.60 5.547 B+D 0.13 0.016 31.70 5.569 " 0.15 0.019 31.67 5.563 D 0.28 0.035 30.02 5.178 " 0.63 0.077 28.53 4.856 " 0.98 0.119 27.56 4.658 D+E 1.06 0.128 27.28 4.600 " 1. 25 0.149 25.93 4.315 E 1.87 0.220 23.96 3.927 " 2.75 0.323 22.85 3.737 " 4.01 0.469 21.21 3.456 " 5.29 0.619 19.97 3.258 C+E 5.32 0.623 19.97 3.259 " 14.06c 1.468 - - C continued.•.•. 356 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium sulfate; Na2S04; [7757-82-6] Foote, H.W.; Vance, J.E. (2) Sodium iodate; NaI03; [7681-55-2] Am. J. Sci. 1930, 19, 203-13.

(3) Water; H20; [7732-18-5]

EXPERIMENTAL VALUES: (Continued)

b A a Na2S04.l0H20; D

E a NaI03.3Na2S04

c For the binary system the compiler computes the following: soly of NaI03 • 0.479 mol kg-l at 25'C; 0.529 mol kg-1 at 29.50 C

1 0 0.5973 mol kg-l at 350 C; 0.8267 mol kg- at 50 C

COMMENTS AND/OR ADDITIONAL DATA: The solubility isotherms are reported below (based on mass % units)

2S·C Isothenn 29.S·C Isothenn

Hl)'---L------"'""""::=~~

3S·(, Isotherm SO·C Isotherm Sodium Iodate 357 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium chloride; NaCl; [7647-14-5] Foote, H.W.; Vance, J.E. (2) Sodium iodate; NaI03; [7681-55-2] Am. J. Sci. 1929, 17, 425-30. (3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition at 273, 288, 298 and 308 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 NaCl Nature of the trC mass % mol % mass % mol % solid phasea (compiler) (compiler) 0 - - 26.34 9.928 A 0.29 0.032 26.36 9.970 A+D 0.37 0.041 26.28 9.942 " 0.38 0.042 26.30 9.952 " 0.54 0.059 24.16 8.995 D 0.66 0.072 23.08 8.527 " 0.73 0.079 22.62 8.332 " 1.03 0.111 20.85 7.593 D+B 1.03 0.111 20.88 7.606 " 0.83 0.086 16.30 5.712 B 2.42b 0.225 - - " 15 - - 26.38 9.947 A 0.97 0.109 26.14 9.943 A+D 0.97 0.109 26.12 9.934 " 0.97 0.109 26.30 10.02 " 1.29 0.144 24.64 9.287 D 1.68 0.185 23.14 8.650 C+D 1.71 0.189 23.14 8.653 " 1.75 0.190 20.73 7.601 C 1.87 0.196 16.32 5.782 " continued.•... AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Sodium iodate, sodium chloride and water The source of NaCl and NaJ03 was not given were placed in glass stoppered bottles, and in the original paper. The authors state the bottles rotated in a thermostat for 24 that the salts were purified by usual meth­ hours. Samples of the solution were drawn ods, however, the details of purification off through glass wool filters. The iodate were not reported. content was determined by addking KI to the solution, acidifying with sulfuric acid, and titrating the free iodine with sodium thio­ sulfate solution. The chloride content was calculated from the 103 concentration and the total weight of salt in solution. Water was found by difference. The solid phases were analyzed as wet residues after largely freeing them from ESTIMATED ERROR: water by pressing between filter papers. Nothing specified. The composition of the dry residue was then determined by Schreinemakers' method.

REFERENCES: 358 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium chloride; NaCl; (7647-14-5] Foote, H.W.; Vance, J.E.

(2) Sodium iodate; NaI03; (7681-55-2] Am. J. S~. 1929, 17, 425-30.

(3) Water; H20; (7732-18-5]

EXPERIMENTAL VALUES: Continued) Composition of saturated solutions NaI03 NaCl t/'C mass % mol % mass % mol % solid phasea (compiler) (compiler) 15 2.34 0.233 9.46 3.193 B+c 2.35 0.234 9.47 3.197 2.53 0.247 6.60 2.184 B 5.88b 0.566 "

25 26.50 10.00 A 1. 96 0.225 26.08 10.03 A+c 1.99 0.226 25.93 9.960 1.98 0.225 26.08 10.03 " 8.66b 0.856 C

35 26.66 10.08 A 1. 70 0.193 26.20 10.05 2.39 0.273 26.04 10.06 A+C 2.40 0.274 26.00 10.04 2.39 0.273 26.02 10.05 " 2.41 0.275 26.07 10.07 2.47 0.275 23.15 8.730 C 2.57 0.282 21.24 7.891 4.51 0.454 7.87 2.68 10.57b 1.065 a A = NaCl;

b For the binary system the compiler computes the following: soly of NaI03 = 0.125 mol kg-l at O'C = 0.316 mol kg-l at l5'C = 0.479 mol kg-l at 25'C 0.5973 mol kg-l at 35'C COMMENTS AND/OR ADDITIONAL DATA: The solubility isotherms are reproduced below (based on mass % units). Sodium Iodate 359 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium bromide; NaBr; [7647-15-6] Ricci, J.E.

(2) Sodium iodate; Nar03; [7681-55-2] J. Am. Chern. SO~. 1934, 56, 290-5.

(3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto T/K = 278 - 323

EXPERIMENTAL VALUES: Composition of saturated solutions NaBr Nar03 Density Nature of the 3 a trC mass % mol % mass % mol % g cm- solid phase 5 45.08 12.57 0.00 0.00 1.489 A 45.04 12.56 0.076 0.011 1.491 A+S5 45.00 12.54 0.075 0.011 1.492 " 45.07 12.57 0.073 0.011 1.492 " 45.04 12.56 0.075 0.011 1.492 " 43.99 12.10 0.084 0.012 1.473 S5 39.98 10.46 0.124 0.0169 1.415 " 35.04 8.655 0.231 0.0297 1.352 " 29.50 6.874 0.584 0.0708 1.287 " 24.56 5.461 1.09 0.126 1.238 " 23.53 5.186 1.27 0.146 1.229 S5+B 23.49 5.176 1.28 0.147 1. 230 " 23.51 5.181 1.28 0.147 1.230 " 22.95 5.027 1.25 0.142 1.225 B 18.42 3.850 1.13 0.123 1.175 " 14.13 2.832 1.09 0.114 1.132 " 10.37 2.008 1.13 0.114 1.097 II 4.97 0.920 1.44 0.139 1.052 " 0.00 0.000 3.297 0.3094 1.027 " 23.30 5.127 1.34 0.153 1.227 ., S5(m) 21. 71 4.723 1. 78 0.201 1.215 S5+C(m) 20.78 4.476 1. 74 0.195 1.204 C(m) 16.39 3.384 1.85 0.199 1.162 " continued.•••• AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Ternary complexes were stirred for 1-2 weeks The salts used were prepared by recrystal­ at temperatures below 40°C, and for 2-4 days lization of the best available c.p. mat­ at higher temperatures (40-50°C). This erial which, in the case of the bromide, length of time allowed for the attainment usually contained from 0.5 to 1.0 % of equilibrium as determined in several caseE chloride. by successive analysis of the solutions. The purified salts were dried to the Care had to be taken to seed each complex anhydrous state and stored at 100°C. with the expected stable solid phase when­ ever possible, and to break up the caked hydrates which sometimes formed on mixing the salt with water in the preparation of the complexes. In one sample of the satu­ rated solution, the iodate was determined ESTIMATED ERROR: by titration with standard thiosulfate solution. In another sample, the total Nothing specified. solid was determined by evaporation of the solution at 100°C followed by one to two hours at 350°C. The concentration of the bromide was then determined by difference. REFERENCES: 360 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium bromide; NaBr; [7647-15-6) Ricci, J.E.

(2) Sodium iodate; NaI03; [7681-55-2) J. Am. Chern. SO~. 1934, 56, 290-5.

(3) 'Water; H2O; [7732-18-5)

1':XPERIMENTAL VALUES: (Continued) Composition of saturated solutions NaBr NaI03 Density Nature of the t/oC mass % mol % mass % mol % g cm- 3 solid phasea (compiler) (compiler) 5 12.26 2.438 2.03 0.210 1.123 C(m) 6.97 1. 327 2.52 0.249 1.079 II 0.00 0.000 5.479b 0.525 1.050 II

15 46.54 13.23 0.00 0.000 - A 27.15 6.266 1.91 0.229 1.278 S5+C 22.08 4.837 2.05 0.234 1.219 C 18.54 3.925 2.20 0.242 1.184 II 13.41 2.710 2.53 0.266 1.136 II 9.16 1. 78 2.69 0.272 1.101 B 4.27 0.802 3.53 0.345 1.064 II 0.00 0.000 5.85b 0.562 1.051 II

25 48.41 14.11 0.00 0.000 1. 530 A 48.23 14.11 0.42 0.064 1.538 A+S5 48.17 14.08 0.42 0.064 1.536 II 48.21 14.10 0.42 0.064 1.541 II 48.22 14.11 0.42 0.064 1.534 II 48.21 14.10 0.42 0.064 1.537 II 47.73 13.87 0.42 0.063 - S5 47.35 13.69 0.42 0.063 1.522 II 46.~ 13.40 0.45 0.067 1.509 II 43.58 12.01 0.55 0.079 1.472 II 39.55 10.40 0.86 0.12 1.417 II 38.83 10.13 0.95 0.13 1.406 II 36.61 9.343 1.31 0.174 1. 380 II 35.23 8.867 1.51 0.198 1.367 II 34.62 8.668 1.66 0.216 1.360 II 34.34 8.575 1.71 0.222 1. 359 II 32.79 8.084 2.13 0.273 1.344 S5+C 32.72 8.063 2.15 0.275 1.343 II 32.56 8.011 2.18 0.279 1.343 II 32.63 8.034 2.17 0.278 1.343 II 32.68 8.050 2.16 0.277 1.343 II 32.44 7.970 2.17 0.277 1.338 C 26.39 6.072 2.35 0.281 1.266 II 16.49 3.451 3.00 0.326 1.172 II 7.78 1.52 4.46 0.454 1.104 II 0.00 0.00 8.569b 0.8460 1.075 II

35 50.48 15.14 0.00 0.000 A 50.04 15.16 1.01 0.159 A+S5 50.00 15.14 1.02 0.161 II 50.02 15.15 1.02 0.161 II 49.46 14.86 1.03 0.161 S5 47.82 14.05 1.08 0.165 II 46.46 13.42 1.18 0.177 II 44.96 12.75 1. 30 0.192 II 42.59 11. 76 1.60 0.230 II 40.55 10.96 1.98 0.278 II 38.11 10.08 2.63 0.362 II 38.1 10.08 2.6 0.358 S5+D(m?) Sodium Iodate 361

COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium bromide; NaBr; [7647-15-6) Ricci, J.E. (2) Sodium iodate; NaI03 [7681-55-2) J. Am. Chern. Soc. 1934, 56, 290-5. (3) Water; H20; [7732-18-5)

EXPERIMENTAL VALUES: (Continued) Composition of saturated solutions NaBr NaI03 Density Nature of the t/°C mass % mol % mass % mol % g cm- 3 solid phasea 35 38.30 10.17 2.70 0.373 D(m?) 36.52 9.498 2.81 0.380 II 34.51 8.776 2.95 0.390 II 0.00 0.00 10.58b 1.066 C

40 51.5 15.7 0.00 0.00 A 50.84 15.67 1. 37 0.220 A+SO 50.84 15.67 1.37 0.220 II 50.84 15.67 1. 37 0.220 II 50.37 15.42 1. 39 0.221 SO 50.43 15.46 1.42 0.226 II 49.38 14.94 1.53 0.241 II 48.41 14.49 1.71 0.266 II 47.95 14.27 1.77 0.274 SO+S5 47.96 14.28 1.80 0.279 S5 46.82 13.74 1.89 0.288 II 45.93 13.34 2.00 0.302 II 44.86 12.86 2.13 0.318 II 43.37 12.25 2.48 0.364 II 42.38 11.84 2.59 0.376 II 42.10 11. 73 2.65 0.384 S5+D 41.82 11.62 2.72 0.393 II 41. 96 11.67 2.69 0.389 II 42.44 11.85 2.52 0.366 D(m) 41.36 11.40 2.59 0.371 D 40.05 10.86 2.63 0.371 II 39.5 10.64 2.65 0.371 D+C 37.73 9.952 2.75 0.377 D(m) 37.29 9.789 2.80 0.382 II 39.06 10.47 2.68 0.373 C 36.79 9.575 2.62 0.355 II 32.08 7.909 2.77 0.355 II 27.16 6.355 3.04 0.370 II 20.65 4.539 3.65 0.417 II 0.00 0.000 11.70b 1.192 II

45 52.55 16.24 0.00 0.000 A 51.79 16.30 1.81 0.296 A+SO 49.91 15.35 2.08 0.333 SO 49.5 15.23 2.5 0.40 SO+D 50.29 15.67 2.56 0.415 D(m) 48.64 14.79 2.51 0.397 D 45.95 13.45 2.50 0.380 II 42.63 11.94 2.58 0.376 II - - - - D+C 0.00 0.00 12.83b 1.322 C

continued•...•

AMH-M 362 Sodium Iodate

COHPONENTS: ORIGINAL MEASUREMENTS (1) Sodium bromide; NaBr; [7647-15-6] Ricci, J.E. (2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. SOQ. 1934, 56, 290-5. (3) Water; H20; [7732-18-5]

EXPERIMENTAL VALUES: (Continued) Composition of saturated solutions NaBr NaI03 Density Nature of the t/oC mass % mol % mass % mol % g cm- 3 solid phasea (compiler) (compiler) 50 53.63 16.84 0.00 0.000 A 53.0(+) 16.92 1.57(-) 0.261 A+E 52.97 16.90 1. 57 0.260 E 52.57 16.89 2.37 0.396 E+SO 52.39 16.80 2.40 0.400 SO 52.12 16.65 2.40 0.399 II 51.40 16.26 2.49 0.410 II 50.97 16.06 2.62 0.429 SO+D 50.90 16.02 2.63 0.430 II 50.91 16.03 2.64 0.432 II 50.93 16.04 2.63 0.431 II 50.30 15.69 2.60 0.422 D 47.72 14.32 2.54 0.396 II 44.74 12.89 2.56 0.384 II 41. 56 11.50 2.67 0.384 II 38.56 10.29 2.86 0.397 II 32.41 8.087 3.41 0.442 II 26.02 6.105 4.30 0.525 II 23.54 5.403 4.73 0.564 II 21.46 4.841 5.15 0.604 D+C 19.75 4.365 4.93 0.566 C 19.57 4.313 4.86 0.557 II 13.28 2.790 6.28 0.686 II 6.63 1.34 9.03 0.952 II 0.00 0.00 13.49b 1.400 II a A = NaBr. 2H20 ; B c NaI03.5H20; C = NaI03·H20; D = NaI03; E c NaBr;

S5 = 2NaI03.3NaBr.15H20; SO c 2NaI03.3NaBr.10H20; m = metastable

b For the binary system the compiler computes the following: -1 soly of NaI03 = 0.2929 mol kg at 5°C = 0.3163 mol kg-1 at 15°C = 0.4736 mol kg-1 at 25°C = 0.5979 mol kg-1 at 35°C = 0.6696 mol kg-1 at 40°C = 0.7438 mol kg-1 at 45°C = 0.7880 mol kg-1 at 50°C COMMENTS AND/OR ADDITIONAL DATA: Isotherms based on mass % units are reproduced below.

continued•.•.. Sodium Iodate 363 COHPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium bromide; NaBr; [7647-15-6] Ricci, J.E. (2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1934, 56, 290-5. (3) Water; H20; [7732-18-5]

COMMENTS AND/OR ADDITIONAL DATA: (Continued)

, "

•.' 50' ._--..- .:::::.:: :~: ...... _...' ,- ..•. " J.5- ...... ' .....

•••••••••••.. • 2S' ..-.' • IS'

System NaIO,...NaBr-H,O 364 Sodium Iodate

COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodide; NaI; [7681-82-5] Hill, A.E.; Willson, H.S.; Bishop, J.A.

(2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1933, 55, 520-6. (3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto T/K .. 281 - 313

EXPERIMENTAL VALUES: Composition of saturated solutions NaI NaI03 Density Nature of the t/·c mass % mol % mass % mol % g cm-3 solid phasea (compiler) (compiler) 8 0.00 0.00 3.89b 0.367 1.035 A 6.05 0.783 1. 99 0.195 1.069 " 17.18 2.471 1.44 0.157 1.169 " 19.47 2.882 1.84 0.206 1.196 A+S 25.20 3.924 0.72 0.085 1. 249 S 40.70 7.629 0.08 0.011 1.445 " 57.87 14.17 0.02 0.004 - " 62.44 16.66 0.02 0.004 1.861 S+D 62.49 16.68 0.00 0.000 - D 25 0.00 0.00 8.67b 0.857 1.077 B 11.57 1.617 4.23 0.448 1.107 " 24.54 3.882 2.68 0.321 1.253 " 28.70 4.758 2.48 0.311 1.290 " 31.72 5.454 2.41 0.314 1.340 " 31. 74 5.455 2.36 0.307 1. 340 " 31.99 5.515 2.36 0.308 1.341 B+S 33.04 5.749 2.04 0.269 1.352 S 36.64 6.607 1. 22 0.167 1.377 " 46.08 9.359 0.31 0.048 - " 56.83 13.70 0.17 0.031 1.722 " continued•••••

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: The salts were weighed into stoppered Pyrex Sodium iodate was recrystallized from water tubes with weighed amounts of water and stir­ and dehydrated in an electric oven at 100·C red by mechanical inversion in a thermostat Sodium iodide (c.p. grade) was purified by for 4-7 days. recrystallization and dried in an electric Small samples of the saturated solution were oven at 100·C. withdrawn by suction through a filter into a pipet. One sample was dried to constant weight in the oven, while a second was analyzed for iodate. Iodate was determined by iodometry, thio­ sulfate solution being used in the titra­ tion. The water was determined gravimetri­ cally (after evaporation). ESTIMATED ERROR: Soly: precision of the analyses about 0.3 %. Temp: not given.

REFERENCES: Sodium Iodate 365

COHPONENTS: O~IGINAL HEASUREHENTS: (1) Sodium iodide; NaI; [7681-82-5] Hill, A.E.; Willson, H.S.; Bishop, J.A.

(2) Sodium iodate; NaI03; [7681-55-2] J. Am. Chern. Soc. 1933, 55, 520-6.

(3) Water; H20; [7732-18-5]

EXPERIHENTAL VALUES: Composition of saturated solutions NaI NaI03 Density Nature of the mass % mol % mass % mol % g cm- 3 solid phasea (compiler) (compiler) 25 64.67 18.06 0.08 0.017 S+D 64.72 18.06 0.00 0.000 D

40 0.00 0.000 11.70b 1.192 B 15.33 2.254 5.24 0.584 18.16 2.738 4.74 0.541 " 19.64 3.001 4.47 0.517 22.06 3.441 3.90 0.461 26.85 4.408 3.49 0.434 C 33.65 5.970 2.92 0.392 40.52 7.877 2.78 0.409 " 41.16 8.076 2.79 0.415 C+S 41. 30 8.121 2.80 0.417 S 42.55 8.510 2.72 0.412 51. 97 11. 62 0.58 0.098 " 64.40 18.04 0.47 0.100 66.15 19.15 0.32 0.070 67.58 20.16 0.28 0.063 S+D 67.35 19.87 0.00 0.000 D

D = NaI. 2H20; S = solid solution b For the binary system the compiler computes the following: soly of NaI03 = 0.205 mol kg-1 at 8°C = 0.480 mol kg-1 at 25°C = 0.6696 mol kg-1 at 40°C COHHENTS AND/OR ADDITIONAL DATA: The solubility isotherms are reproduced below (based on mass % units).

1:1 1:2 NaI

BOC Isotherm 25°C Isotherm 366 Sodium Iodate COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [7681-55-2] Hill, A.E.; Ricci, J.E.

(2) Potassium iodate; KI03; [7758-05-6] J. Am. Chern. Soc. ~, 53, 4305-15. (3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: Composition at 278.2, 298.2, 323.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 KI03 Density Nature of the t/OC mass % mol % mass % mol % g cm-3 solid phasea (compiler) (compiler) 5 0.00 0.000 5.16 0.456 1.043 A 1.41 0.136 4.71 0.420 1.051 " 2.17 0.211 4.72 0.424 1.060 A+B 2.48 0.238 3.19 0.283 1.046 B 3.28b 0.308 0.00 0.000 1.028 " 25 0.00 0.000 8.45 0.771 1.071 A 4.26 0.433 7.09 0.666 1.098 " 7.13 0.743 6.73 0.649 1.126 A+C 7.79 0.793 3.79 0.357 1.103 C 8.57b 0.846 0.00 0.000 1.074 " 50 0.00 0.000 13.21 1.265 A 3.92 0.417 11.92 1.173 7.70 0.847 11.14 1.133 10.92 1.237 10.61 1.112 A+C 11.41 1. 261 7.93 0.810 C 12.55 1. 349 4.24 0.421 13.49b 1.400 0.00 0.000 " a A = KI03; B = NaI03·5H20; C = NaI03·H20 b For the binary system the com1iler computes the following: soly of NaI03 = 0.171 mol kg- at 5°C; = 0.474 mol kg-l at 25°C; = 0.7880 mol kg-l at SOOC. AUXILIARY INFORMATION

METHOD/APPARATUS/PROCEDURE: COMMENTS AND/OR ADDITIONAL DATA: The complexes used for the ternary system were made up from weighed amounts of water, dried NaI03 and KI03' For the 5°C isotherm, H 0 the solids were first dissolved by heating, 2 and the solutions were seeded after cooling. The solutions were agitated in a thermostat at the desired temperature for about thir­ teen days. For the analysis, samples of filtered solu­ tion were evaporated to dryness at 110°C, and other samples were titrated for iodate by iodometry.

SOURCE AND PURITY OF MATERIALS: Nothing specified.

ESTIMATED ERROR: Nothing specified, but the compiler assumes that the agreement between duplicate analyses was around ± 0.5 %.

~o~, 25°C, 50°C Isotherm (mass % units) Sodium Iodate 367 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [7681-55-2] Vinogradov, E.E.; Karataeva, I.M.

(2) Rubidium iodate; RbI03; [13446-76-9] Zh. Neo~g. K~. 1982, 21, 2155-7; Ru.6.6. J. Tno~g. CheIn. (Eltgl. TMIt.6l.) (3) Water; H20; [7732-18-5] 1982, 27, 1218-9.

VARIABLES: PREPARED BY: Composition at 323.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 RbI03 Nature of the mass % mol % mass % mol % solid phasea (compiler) (compiler) 50 13.52b 1.403 - - A 13.40 1.419 1. 96 0.158 " 13.77 1.465 2.03 0.164 A+B 13.74 1.461 2.05 0.166 " 12.20 1. 283 2.50 0.200 B 7.25 0.723 2.30 0.174 " 3.96 0.383 2.32 0.170 " 2.92 0.282 3.29 0.241 " - - 4.39b 0.317 ..

B = RbI03

b For the binary systems the compiler computes the following: l soly of NaI03 = 0.7900 mol kg- soly of RbI03 = 0.176 mol kg-l

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: Probably the isothermal method was used. COMMENTS AND/OR ADDITIONAL DA'l"A: Equilibrium was established after 4-5 days. The phase diagram is given below (based on Rubidium and iodate ions in the liquid and mass % units). solid phases were analyzed. The sodium content was determined by difference. NaI0 The composition of the solid phase was 3 determined by X-ray analysis. 100 SOURCE AND PURITY OF MATERIALS:

No information given. 80 - ESTIMATED ERROR: -

Nothing specified. 60 .

~o

to ~.

l=:- =:::---.-. . to -/10 60 30 10(J FbI0 3 368 Sodium Iodate COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [7681-55-2] Vinogradov, E.E.; Karataeva, I.M.

(2) Cesium iodate; CsI03; [13454-81-4] Zh. Neong. Khlm. 1982, 27, 2155-7; Ru&~. J. Inong. Chern. (Engl. Tna~t.) (3) Water; H20; [7732-18-5] 1982, 27, 1218-9.

VARIABLES: PREPARED BY: Composition at 323.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions NaI03 CsI03 Nature of the t/oC mass % mol % mass % mol % solid phaseb (compiler) (compiler) 50 13.52b 1.403 -- A 12.15 1.262 1.41 0.0942 " 12.46 1.309 2.16 0.146 A+B 12.46 1.306 1.96 0.132 " 12.49 1.314 2.23 0.151 " 12.61 1. 325 2.02 0.136 " 11.77 1.231 2.40 0.161 B 10.27 1.054 2.12 0.140 " 6.93 0.688 2.18 0.139 " 3.34 0.324 3.44 0.215 " - - 5.07b 0.312 " a A a NaI03.H20; B = CsI03

b For binary systems the compiler computes the following:

soly of NaI03 a 0.7900 mol kg-1 1 soly of CsI03 a 0.174 mol kg-

AUXILIARY INFORMATION

METHOD/APPARATUS/PROCEDURE: COMMENTS AND/OR ADDITIONAL DATA: Probably the isothermal method was used. The phase diagram is given below (based Equilibrium was established after 4-5 days. on mass % units). Cesium and iodate ions in the liquid and solid phases were analyzed. The sodium NaI0 3 content was determined by difference. 100 The composition of the solid phase was de­ termined by X-ray analysis.

SOURCE AND PURITY OF MATERIALS: 80 - No information given. . i 40 ESTIMATED ERROR:

~o " Nothing specified. zo VI -

ZO ~o 40 ''''''80 Sodium Iodate 369 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [7681-55-2] Shk1ovskaya, R.M.; Arkhipov, S.M.; Kidyarov, B.I.; Tokareva, A.G. (2) Aluminum iodate; A1(I03)3; [15123-75-3] Zh. Neo~g. Khim. 1980, 25, 1423-4; (3) Water; H20; [7732-18-5] RUh~. J. Ino~g. Chern. (Engl. Tha~l.J 1980, 25, 791.

VARIABLES: PREPARED BY: Composition at 298.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions at 25'C Al(I0 h Nature of the NaI03 3 a mass % mol % mass % mol % solid phase (compiler) (compiler) 8.66b 0.856 - - A 8.30 0.821 0.38 0.013 " 8.15 0.819 2.02 0.0728 A+B 6.83 0.678 2.21 0.0787 B 6.44 0.638 2.38 0.0846 6.30 0.624 2.45 0.0871 " 5.14 0.504 2.66 0.0936 3.60 0.350 3.18 0.111 1.52 0.146 4.15 0.143 0.9 0.09 4.48 0.154 - - 5.70b 0.197

a A = NaI03·H20 B = Al(I03)3· 6H20

b For binary systems the compiler computes the following: -1 soly of NaI03 = 0.479 mol kg l soly of A1( I03)3 = 0.110 mol kg-

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: The isothermal method was used. Equili­ Aluminum iodate hexahydrate was synthesized brium was reached within 15-20 days. from iodic acid and aluminum hydroxide. The aluminum content in the co-existing Chemically pure grade sodium iodate phases was determined by comp1exometric monohydrate was recrystallized twice from titration. aqueous solution. Sodium was determined by the flame photo­ metry. The photometry was carried out on solutions in which the sodium concentra­ tion did not exceed 10 ~g dm- 3 .

ESTIMATED ERROR: Soly: 1-3 rel %. Temp: precision ± 0.1 K.

REFERENCES: 370 Sodium Iodate COMPONENTS: ORIGINAL MEASUREMENTS: Shklovskaya, R.M.; Arkhipov, S.M.; (1) Sodium iodate; NaI03; [7681-55-2] Kidyarov, B.I.; Poleva, G.V.; Timofeev, 5.1. (2) Hafnium iodate; Hf(I03)4; [19630-06-9] Zh. Neong. Khtm. 1983, 28, 2435-6; RU6.6. J. InMg. Chern. (Eng£.. T!U1Yl.6L) (3) Water; H 0; [7732-18-5] 2 1983, 28, 1384-5.

VARIABLES: PREPARED BY: Composition at 298.2 K Hiroshi Miyamoto

EXPERIMENTAL VALUES: Composition of saturated solutions at 25°C NaI03 Hf( I 03)4 Nature of mass % mol % mass % mol % the solid (compiler) (compiler) phasea 6 - - 0.00037 7.6 x 10- A 0.87 0.080 0.00036 7.4 x 10-6 " 1.45 0.134 0.00034 7.1 x 10-6 " 2.38 0.221 0.00027 5.7 x 10-6 " 3.29 0.309 0.00025 5.3 x 10-6 " 4.03 0.381 0.00023 4.9 x 10-6 " 4.89 0.466 0.00020 4.3 x 10-6 " 5.68 0.545 0.00018 3.9 x 10-6 " 6.38 0.617 0.00020 4.4 x 10-6 " 7.18 0.699 0.00032 7.0 x 10-6 " 8.23 0.810 0.00034 7.5 x 10-6 " 8.62 0.851 0.00035 7.8 x 10-6 A+B 8.66b 0.856 -- B a A = Hf(I 03) 4 B = NaI03·H2O

b For binary systems the compiler computes the following: -1 soly of NaI03 = 0.479 mol kg -6 -1 soly of Hf(I03)4 = 4.2 x 10 mol kg

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: The isothermal method was used. Equilibrium C.p. grade NaI03.H20 was recrystallized was reached in 25-30 days. Samples of the from distilled water. coexisting phases were analyzed for sodium Hafnium iodate was prepared by the action by emission spectrometry. The hafnium of aqueous iodic acid solution on freshly content was determined potentiometrically precipitated hafnium hydroxide (ref 1.) using Arsenazo III after reducing the iodate ion with hydroxylamine. The composition in the solid phase was determined by the method of residues and the result was checked by X-ray analysis.

ESTIMATED ERROR: Soly: within 1-3 % reI. % (emission spectrometry for Na). Temp: precision ± 0.1 K.

REFERENCES: 1. Deabriges, J.; Rohmer, R. Bull. Soe. Chtm. Fn. 1968, 2, 521. Sodium Iodate 371

COMPONENTS: ORIGINAL MEASUREMENTS: Meerburg, P.A. (1) Sodium iodate; NaI03; [7681-55-2] Z. Ano~g. Atfg. Chern. 1905, 45, 324-44. (2) Iodic acid; HI03 ; [7782-68-5] (3) Water; H20; [7732-18-5]

VARIABLES: PREPARED BY: T/K = 303 Hiroshi Miyamoto Composition

EXPERIMENTAL VALUES: Composition of saturated solutions at 30°C Iodic Acid Sodium Iodate Nature of mass % mol % mass % mol % the solid (compiler) (compiler) phase 0 0 9.36b 0.931 A 1.98 0.526 9.52 0.968 4.86 0.576 10.22 LOn " 5.86 0.708 11.04 1.187 7.40 0.915 11.60 1. 275 A(m) 9.73 1. 280 14.73 1. 722 6.76 0.826 11.18 1.215 A+C 6.75 0.824 11.10 1.205 " 6.66 0.814 11.28 1.226 7.80 0.955 10.30 1.121 C 9.15 1.120 9.00 0.980 9.93 1. 222 8.71 0.953 11. 20 1.280 7.54 0.826 " 11.89 1.471 7.21 0.793 C+D 11. 75 1.451 7.18 0.788 " 14.62 1. 822 5.65 0.629 D 23.23 3.139 3.69 0.443 " 32.68 4.920 2.91 0.389 40.91 6.882 2.64 0.395 " 46.62 8.567 2.67 0.436 " 55.48 11. n 2.12 0.400 " 65.47 16.94 1. 83 0.420 76.19 25.73 1. 42 0.426 D+B 76.70b 25.21 0 0 B

a A = NaI03.l.5H20; B = HI03; C = Na20.2I205; D NaI03.2HI03· b For binary systems the compiler computes the following: soly of HI03 = 18.71 mol kg-l soly of NaI03 = 0.522 mol kg-l METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS A mixture of NaI03' HI03 and water was place Nothing specified. in a bottle and the bottle agitated in a I-=E~S~T=I~MA~T=ED~E=R=R=O=R=:------I thermostat for a week or more at a desired temperature. Equilibrium was established Nothing specified. from supersaturation. COMMENTS AND/OR ADDITIONAL DATA: The iodic acid and sodium iodate contents HI0 were detd as follows: an excess of KI was 3 added to an aliquot of satd sIn, and the (mass % units) X HI03 content detd by titration of the iodine liberated with standard sodium thiosulfate. Dil sulfuric acid was then added to the solution and the iodine libera­ ted was again titrated with sodium thio­ sulfate to obtain the total iodate concen­ tration. The sodium iodate concentration was calcu­ lated from the difference between the second and the first titration. Composition of solid phases determined by the method of residues. 372 Sodium Iodate

COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI0 ; [7681-55-2) Shibuya, M.; Watanobe, T. 3 (2) Iodic acid; HI0 ; [7782-68-5) Venki Kagaku 1967, 35, 550-8 3 (3) Water; H20; [7732-18-5)

VARIABLES: PREPARED BY: Composition Hiroshi Miyamoto and Mark Salomon TIK = 288.2

EXPERIMENTAL VALUES: Composition of saturated solutions at l5.0°C Iodic acid Sodium Iodate density Nature of the mass % mol % mass % mol % g cm- 3 solid phasea (compiler) (compiler) 0.00 0.000 5.87b 0.564 1.051 A 0.62 0.067 5.87 0.568 1.057 " 1. 79 0.197 5.87 0.574 1.070 " 2.59 0.287 5.92 0.584 1.077 " 3.81 0.428 5.90 0.589 1.089 " 5.12 0.583 5.99 0.606 1.103 " 5.66 0.649 6.14 0.626 1.109 " 7.63 0.895 6.38 0.665 1.132 A+B 8.06 0.947 6.18 0.646 1.135 B 9.11 1.08 5.64 0.592 1.143 B+C 10.57 1. 256 4.74 0.501 1.145 C 12.21 1.459 3.68 0.391 1.152 " 19.16 2.435 2.43 0.274 1. 215 " 33.45 5.018 1.88 0.251 - " 43.26 7.444 1.82 0.278 - " a A = NaI03·5H20; B = 2NaI03·1205; C = NaI03·1205

b For the binary system the compiler computes the following: l Soly of NaI03 = 0.315 mol kg-

AUXILLARY INFORMATION

METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Isothermal method by three techniques depend Sodium iodate was recryst three times from ing upon mole fraction, x, of HI03. (1) Fot an aqueous sIn prepd by electrolytic oxida­ x = 0 to 0.574. Excess acid added to NaI03 tion of iodine in alkaline sIn. Iodic acid sIn and stirred for 5 h. (2) For X = 0.574 was prepd by ion exchange as follows: aq to 0.646. Aq acid sIn for x = 0.638 was NaI03 sIn was passed through a column of cooled to obtain HI03 crystals. The crystals H+-resin (Amberlite IR 120), and the eluate were added to an unsatd sIn of NaI03, and the was concentrated to about 30 % acid content mixture was stirred for a long time. (3) x by evaporation. The acid content was detd = 0.646 to 1.0. Method essentially identi­ by acid-base titration. cal to (2) except that the acid crystals pptd from a sIn where x = 0.883, and stir- ring time was stated as 48 h. After equil was established and the sIns al- I-E-S-T-IMA-T-E-D-E-R-R-O-R-:------1 lowed to settle, aliquots of satd sIn were withdrawn with a pipet and weighed. The den Soly: reI error probably ± 0.2 % (compilers). sities of the satd sIns were detd. The tota iodate concn was detd iodometricallv, and Temp: precision ± 0.05 K. the HI03 detd by acid-base titrn. Sodium was detd by difference. REFERENCES: The composition of the solid phase was detd as follows: chern analyses were used to detn the acid and NaI03 contents, and thermo­ gravimetry and NMR were used to detn the water content. Sodium Iodate 373 COMPONENTS: ORIGINAL MEASUREMENTS: (1) Sodium iodate; NaI03; [6781-55-2] Kolthoff, I.M.; Chantooni, Jr., M.K.

(2) 6,7,lO,17,18,20,21-0ctahydrodibenzo Anal. Chern. 1980, 52, 1039-44. [b,k] [1,4,7,10,13,16] hexaoxacyclooc- tadecin (dibenzo-18-crown-6); C20H2406; [14187-32-7]

(3) Methanol; CH40; [67-56-1] VARIABLES: PREPARED BY:

T/K = 298 Hiroshi Miyamoto

EXPERIMENTAL VALUES:

The solubility product of NaI03 in methanol at 25°C is 1.5 x 10-7 mo1 2 dm- 6

COMMENTS AND/OR ADDITIONAL DATA:

In solutions saturated with respect to NaI03 and dibenzo-18-crown-6 (DB-18h the authors studied the equilibrium

wh~re L = (ligand) concentration of dibenzo-18-crown-6. Details of experimental method presumed to be similar to those for KI03-DB-18-MeOH system (compiled elsewhere in this volume). Authors only report log [Kf(LNa+)/mol-l dm3] = 4.4.

AUXILIARY INFORMATION METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: A Markson No. 1001 Na+ specific ion electrode Fisher "c.p." grade NaI03 was recrystallized used to determine aNa+. TIle electrode was 3 times from distilled water, and dried calibrated and found to respond in a at 70°C. Nerllstian manner. (Fisher "Spectro purity" grade) was distil­ led from magnesium turnings.

ESTIMATED ERROR: Nothing specified.

REFERENCES: